'use client';

import { useState, useEffect } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { XMarkIcon, ExclamationTriangleIcon, CheckCircleIcon, InformationCircleIcon } from '@heroicons/react/24/outline';

export type ErrorType = 'error' | 'warning' | 'success' | 'info';

interface ErrorNotificationProps {
  message: string;
  type?: ErrorType;
  duration?: number;
  onClose?: () => void;
}

export function ErrorNotification({ message, type = 'error', duration = 5000, onClose }: ErrorNotificationProps) {
  const [isVisible, setIsVisible] = useState(true);

  useEffect(() => {
    if (duration > 0) {
      const timer = setTimeout(() => {
        setIsVisible(false);
        onClose?.();
      }, duration);
      return () => clearTimeout(timer);
    }
  }, [duration, onClose]);

  const handleClose = () => {
    setIsVisible(false);
    onClose?.();
  };

  const getIcon = () => {
    switch (type) {
      case 'error':
        return <ExclamationTriangleIcon className="w-5 h-5" />;
      case 'warning':
        return <ExclamationTriangleIcon className="w-5 h-5" />;
      case 'success':
        return <CheckCircleIcon className="w-5 h-5" />;
      case 'info':
        return <InformationCircleIcon className="w-5 h-5" />;
    }
  };

  const getStyles = () => {
    switch (type) {
      case 'error':
        return {
          bg: 'bg-red-50 dark:bg-red-900/20',
          border: 'border-red-200 dark:border-red-800',
          text: 'text-red-800 dark:text-red-200',
          icon: 'text-red-500',
          close: 'text-red-400 hover:text-red-600 dark:text-red-300 dark:hover:text-red-100'
        };
      case 'warning':
        return {
          bg: 'bg-yellow-50 dark:bg-yellow-900/20',
          border: 'border-yellow-200 dark:border-yellow-800',
          text: 'text-yellow-800 dark:text-yellow-200',
          icon: 'text-yellow-500',
          close: 'text-yellow-400 hover:text-yellow-600 dark:text-yellow-300 dark:hover:text-yellow-100'
        };
      case 'success':
        return {
          bg: 'bg-green-50 dark:bg-green-900/20',
          border: 'border-green-200 dark:border-green-800',
          text: 'text-green-800 dark:text-green-200',
          icon: 'text-green-500',
          close: 'text-green-400 hover:text-green-600 dark:text-green-300 dark:hover:text-green-100'
        };
      case 'info':
        return {
          bg: 'bg-blue-50 dark:bg-blue-900/20',
          border: 'border-blue-200 dark:border-blue-800',
          text: 'text-blue-800 dark:text-blue-200',
          icon: 'text-blue-500',
          close: 'text-blue-400 hover:text-blue-600 dark:text-blue-300 dark:hover:text-blue-100'
        };
    }
  };

  const styles = getStyles();

  return (
    <AnimatePresence>
      {isVisible && (
        <motion.div
          initial={{ opacity: 0, y: -20, scale: 0.9 }}
          animate={{ opacity: 1, y: 0, scale: 1 }}
          exit={{ opacity: 0, y: -20, scale: 0.9 }}
          transition={{ duration: 0.3, ease: 'easeOut' }}
          className={`fixed top-4 right-4 z-50 max-w-sm w-full ${styles.bg} ${styles.border} border rounded-xl shadow-lg backdrop-blur-sm`}
        >
          <div className="flex items-start p-4">
            <div className={`flex-shrink-0 ${styles.icon} mr-3 mt-0.5`}>
              {getIcon()}
            </div>
            <div className="flex-1">
              <p className={`text-sm font-medium ${styles.text}`}>
                {message}
              </p>
            </div>
            <button
              onClick={handleClose}
              className={`flex-shrink-0 ml-3 ${styles.close} transition-colors`}
            >
              <XMarkIcon className="w-5 h-5" />
            </button>
          </div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}

// 全局错误管理器
class ErrorManager {
  private static instance: ErrorManager;
  private listeners: Array<(notification: ErrorNotificationProps & { id: string }) => void> = [];

  static getInstance(): ErrorManager {
    if (!ErrorManager.instance) {
      ErrorManager.instance = new ErrorManager();
    }
    return ErrorManager.instance;
  }

  showError(message: string, duration?: number) {
    this.showNotification(message, 'error', duration);
  }

  showWarning(message: string, duration?: number) {
    this.showNotification(message, 'warning', duration);
  }

  showSuccess(message: string, duration?: number) {
    this.showNotification(message, 'success', duration);
  }

  showInfo(message: string, duration?: number) {
    this.showNotification(message, 'info', duration);
  }

  private showNotification(message: string, type: ErrorType, duration?: number) {
    const notification = {
      id: Math.random().toString(36).substr(2, 9),
      message,
      type,
      duration: duration ?? (type === 'error' ? 5000 : 3000)
    };

    this.listeners.forEach(listener => listener(notification));
  }

  subscribe(listener: (notification: ErrorNotificationProps & { id: string }) => void) {
    this.listeners.push(listener);
    return () => {
      this.listeners = this.listeners.filter(l => l !== listener);
    };
  }
}

export const errorManager = ErrorManager.getInstance();

// 错误提示容器组件
export function ErrorNotificationContainer() {
  const [notifications, setNotifications] = useState<Array<ErrorNotificationProps & { id: string }>>([]);

  useEffect(() => {
    const unsubscribe = errorManager.subscribe((notification) => {
      setNotifications(prev => [...prev, notification]);
    });

    return unsubscribe;
  }, []);

  const removeNotification = (id: string) => {
    setNotifications(prev => prev.filter(n => n.id !== id));
  };

  return (
    <>
      {notifications.map((notification) => (
        <ErrorNotification
          key={notification.id}
          {...notification}
          onClose={() => removeNotification(notification.id)}
        />
      ))}
    </>
  );
}